Strip rewinding means



Dec. 8, 1953 c. A. cHRlsToFF STRIP REWINDING MEANS 3 Sheets-Sheet l Filed Dec. 18, 1950 INVENTOR. CHR/s 4. MP/.fran- 1 ATU/iwf Y ...il All..

Dec. 8, 1953 c. A. cHRls'roFF STRIP REWINDING MEANS 3 Sheets-Sheet 2 Filed Dec. 18, 1950 INVEN! OR. CHR/s CMP/s UFF /y Dec. 8., 1953 c. A. cHRlsToFF 2,661,910

STRIP REWINDING MEANSv Filed nee. 18. 195o s sheets-sheet s 1N: '15N TOR. 6MP/s fr. CHR/eraf? Patented Dec. 8, 1953 asti-sit UNITED STATES PATENT OFFICEl STRIP REWINDING MEANS Chris A. Christoff, San Gabriel, Calif., assigner to Clary Multiplier Corporation, San Gabriel, Calif., a corporation of California Application December 18, 1950, Serial No. 201,418

5 Claims.

This invention relates to calculating listing machines, adding listing machines, cash register listing machines and the like and has particular reference to paper takeup devices for such maf chines wherein a paper strip having values recorded thereon by the machine is wound upon a rewind roll and periodically removed for accounting or record purposes.

In order to facilitate removal of such a roll when a capacity diameter is reached, or for other reasons, the roll is usually wound on a flanged mandrel which is removably mounted for rota-1 tion in the machine and is rotatably driven by some driving part of the machine mechanism.

In connection with cash registering machines where, for example, a line of customers may be waiting on the cashier, it is of utmost importance that the paper rewind roll be quickly and readily removable and replaceable with the least amount of effort or waste of time and with the least amount of dismantling or handling of parts. Also, when installing the rewind mandrel, the paper attached thereto is usually loose and must generally be wound up manually on the mandrel to remove any sagging or looping before operation of the machine can commence.

Although the provision of a quickly removable and replaceable paper rewind mandrel is a necessary attribute to a cash register machine, it is also a desirable feature when used for rewindng tally rolls and the like for adding listing, bookkeeping and other forms of business machines where the tape must be retained after values are recorded thereon.

it therefore becomes a principal object of the invention to facilitate removal and replacement of a paper rewind mandrel for a machine of the above type.

Another object is to facilitate removal of a roll of paper from a. rewind mandrel on which the paper is wound.

Another object is to provide a coupling device for driving a paper rewind mandrel which is automatic in its coupling action.

Another object is to provide a coupling device for a paper rewind mandrel which is rendered ineffective upon withdrawal of the mandrel and which is again rendered effective upon operation of the drive means for the mandrel.

A still further object is to provide a simple device of the foregoing type which is economical to manufacture and which has no parts which must be removed from the machine, other than the mandrel itself, in order to remove a rewind roll.

The manner in which the above and other` ob- 2 jects of the invention are accomplished will be readily understood on reference to the following specification when read in conjunction with the accompanying drawings, wherein:

Fig. 1 is a longitudinal sectional View through a part of a cash register machine embodyingthe present invention.

Fig. 2 is a sectional view, similar to that of Fig. 1, illustrating the platen advancing means.

Fig. 3 is an exploded perspective view of the paper takeup mandrel and the drive coupling means therefor.

Fig. 4 is a plan view of the paper feed mechanism, with the machine covers removed, and is taken substantially along the line l-Ll of Fig. 1.

Fig, 5 is a plan View, similar to Fig. 4, with parts removed and with the coupling device in uncoupling position.

The invention is herein disclosed as embodied in the well known commercially available Clary cash register machine, Model 303, which is disclosed and claimed generally in the copending application of V. S. Golemon, S. N. 103,468, iiled July 7, 1949. Various operating instrumentalities of the machine, particularly of the computing section, are disclosed and claimed in the copending applications of R. E. Boyden, S. N. 582,553, filed March 13, 1945, now U. S. Patent No. 2,583,810, and the copending application of Boyden et al., S. N. 38,294, illed July l2, 1948, now U. S. Patent No. 2,607,526.

lt should be understood, however, that although the invention is disclosed in connection with, and particularly applicable to cash registering machines it may equally wellV be applied to other forms of business machines of the recording or listing type.

The machine in general comprises a computing section (not shown) enclosed by a plastic cover partly indicated at 36! and a cash drawer section enclosed by a cover, part of which is indicated at li, underlying the computing section.

A rear cover H3 is removably attached to the machine to permit access to the paper tape to install or remove the supply and takeup rolls. The cover H3 is held in place on the cover 36l at its upper end by a pair of locating pins, one of which is indicated at H8, xed thereon and extending into openings in the cover 3M.

The lower end of the cover i i3 is provided with tabs, one of which is shown at 122, extending into openings in the cash drawer cover I i and held in place by a slidable lock it@ which serves to removably lock the cover i i3 in place.

Amounts entered into the machine or totaled theretrom are recorded on a pair oi superimposed paper tapes cr strips 2 and I3, as the latter pass over a platen I3, at a printing station P. The latter strips are supplied in double wound form from a supply roll I5 rotatably mounted at IB in the rear or" the cash drawer section. The strips are fed in superimposed relation over a stationary guide il' extending integrally from the cash drawer cover E l. The strips are guided over the lower edge of an opening 25 in the cover 36| and then extend under a takeup roll 33 and around the platen I8 against which they are held by a pressure roller |53. Adjacent the printing station the inner tape I3 passes directly over the surface of the platen I3 whereas the outer tape I2 passes between two strands 20 and 2| of an inked printing ribbon. Above the printing station, the tapes are again superimposed `and eX- tend through an opening 24 formed in the cover 36|.

As disclosed in detail in the aforementioned Boyden application, S. N. 582,553, the printing mechanism comprises a series of printer type wheels |35 carried in side by side relation independent of each other on individual arms |36. The latter are loosely keyed on a printer control shaft E37. Springs I3-t tend to rock the arms |36 clockwise to cause the type wheels i35 to strike the superimposed strands of printing ribbon and paper tapes at the printing station. However, the arms are normally retained in the position shown by the shaft i3? until the printing phase of the machine cycle at which time the shaft is rocked clockwise by suitable mechanism (not shown) under control of a drive shaft 5| to alo low the printer arms |33 to follow under the action of their springs |38 and thus cause the type wheels |35 to print the values registered thereon.

Registration of the dials is eiected through the usual actuator rack mechanism (not shown) each rack being entrained with an idler gear I4I rotatably mounted on a cross shaft |42. The gear 14| is normally in mesh with a pinion |40 rotatably mounted n the associated printer arm |33 when the arms are held in their positions illustrated in Fig. 1. rIfhe'pinion |40 is maintained in permanent mesh with a gear I 39 integral with the associatedtype wheel |35.

The `printing mechanism is mounted in a manner not shown on a printer frame comprising a pair of laterally spaced frame plates 21 and 28 suitably supported in the main machine frame.

Means are provided for intermittently rotating the platen it whereby to advance the superimposed tape upwardly a spaced increment during i' each operation of the machine and after the printing operation. As shown in Fig. 2, a ratchet 332 is integrally attached to the platen l0 and is fed by the upper ear of a pawl 303 pivotally connected at 304 to a cam follower 305. The latter is pivoted on a cross shaft 8| and carries a roller 336 engageable with a cam 301 keyed on the drive shaft I. The cam follower 305 is held in engagement with the cam 307 bya tension spring 303 extending between the pawl 303 Vand a lever 303 which for the 'purpose of the present disclosure may be considered asr rpermanently located in its position illustrated injIFigfZ. The spring .333 is also effective to urge vthe'pawl 303 to the left againsta guide ypin 3| I fastened on the arm 303.

A centralizer arm 3|0 is pivoted on a frame pin 3|5I and is urged clockwise by a spring 3I'I to press a roller 313 thereon against the teeth of the ratchet 302 to locate the platen in its different advanced positions. A suitable tear oil? or paper severing bar (not shown) is provided to sever the outer tape I'l above the platen whenever desired. The severed tape may thus be issued for example to a customer as a receipt of a purchase while the inner tape is retained for refer- BDC@ O1 aiCCOuntiDg OLlIpOSeS.

The tape I3 is passed over the tcp of the cover 36|, under the forward edge of the rear cover I i3, and thereupon it is wound on the rewind roll 33 attached to a rewind mandrel 3c. rlhe latter is provided with trunnion journals 3| and 32 journaled in the 1bottoms of bearing slots 23 formed in the printer frame plates 2'! and 23.

Retainers 34 are pivoted on the outer sides of the frame plates 2l' and 28 by coaxially located studs 35 and are held in engagement with the journals 3| and 32 of the mandrel by springs 35 extending between the same and suitable stationary parts of the machine. The engaging edges of the retainers are inclined whereby the mandrel may be grasped and drawn laterally along the slots 29 to remove the same, the retainers yielding downwardly during such movement.

The mandrel 33 is driven through a coupling device generally indicated at 38 by a spring belt 39 formed of an endless tension spring wrapped around a pulley 40 forming part of the coupling wdevice 33 and a second pulley lli integral with the platen I8. The spring belt 39 thus forms a transmission for yieldably rotating the mandrel 30. As shown in Fig. 1 the pulleydl is larger in diameter than the pulley 50 so as to always tend to drive the mandrel 33 at a higher speed than the platen and thereby maintain the portion of-the paper strip extending between the platen i8 and the rewind roll taut regardless of the diameter of the rewind roll.

According to the present invention and in lieu of the usual flanged spool for winding the takeup roll 33, the mandrel 33 is devoid or" side anges for edge guiding the paper tape las it is wound thereon. Thus, when the mandrel with a rewind roll of paper thereon is removed from ythe machine, the roll may be removed therefrom by merely slipping the same endwise ofi of the mandrel. In order to edge guide the paper and prevent it from rubbing against the frame plates 2 and 23 and thereby either jamming the mandrelagainst rotation by the spring belt 39 or creating undue frictional drag on the mandrei, a combined pressure and edge guiding roller t3 is provided having small edge guiding anges 44 at opposite ends thereof. The roller 3 is mounted on a pair of spaced arms l5 pivoted on a cross shaft d3 to the outer sides of the frame plates 2I and 23. Springs l extend between the arms @5 and frame pins it to urge the roller 43 against the periphery of the mandrel. 33 or the takeup roll 33 wound thereon in order to aid in winding a relatively tight roll on the mandrel and to cause the flanges 34 Ato extend over the sides of the roll and thereby edge guide the paper as it is wound thereon.

An important feature of the roller construction is thatit `is loosely pivoted in the arms and that the arms, in turn, are loosely pivoted on the shaft 45, thereby allowing the roller to float laterally a slight amount relative to the frame plates 2l and 28. Thus, when starting to wind a roll of paper, the anges @d of the roller are centered laterally over the outer ends of the mandrel 30 and as the roll builds up on the mandrel the anges are guided laterally by the outer convolutions of the paper.

present disclosure is illustrative rather than restrictive particularly in regard to the make and type of machine to Which it is applied and that changes and modications may be made Without departing from the spirit or scope of the invention as set forth in the claims appended hereto.

Having thus described the invention, what I desire to secure by United States Letters Patent 1. In a recording machine, the combination with a mandrel for rolling a strip thereon, and means rotatably supporting said mandrel, of a drive element for said mandrel, a shaft supporting said drive element for rotation coaxially of said mandrel and for axial movement relative to said mandrel, coupling means on said drive clement and on said mandrel for transmitting a drive therebetween, a spring for urging said drive element toward said mandrel whereby to enable said coupling means, spring means for urging said drive element against one side of said shaft, said spring means being effective to create suncient friction between said drive element and said shaft to prevent axial movement of said drive element by said spring whilel said drive element is at rest but ineffective to prevent axial movement of said drive element while said drive element is rotating.

2. In a recording machine, the combination with a mandrel for rolling paper thereon, and means for rotatably supporting said mandrel, of a drive element engageable with said mandrel, means supporting said drive element for rotation coaxially of said mandrel and for movement xially relative to said mandrel and into and out of engagement with said mandrel, a first spring for urging said drive element toward engagement with said mandrel, a second spring for urging said drive element against said supporting means whereby to create frictional engagement therewith, said second spring being sufcient to prevent axial movement of said drive element by said first spring when said drive element is at rest but insufcient to preventr movement of said drive element -by said rst spring when said drive element is rotating.

3. In a recording machine, the combination with a mandrel for rolling paper thereon, land spaced frames having open slots, each of said slots being closed at one end thereof to form a bearing for rotatably supporting said mandrel, of a drive element engageable with said mandrel, a shaft supporting said drive element for rotation coaxially of said mandrel and for movement axially of said mandrel into yand out of driving engagement therewith, a spring for urging said drive element toward engagement with said mandrel, fthe engaging portions of said drive element and said mandrel being formed to move said drive element along said shaft and against the action of said spring upon movement of said mandrel along said slots, and means for rendering said spring ineiective to move said drive element toward said mandrel when said drive element is at rest and for rendering said spring effective to -move said drive element when said drive element is rotating.

4. In a recording machine, the `combination with a mandrel for rolling paper thereon and spaced frames having slots therein, each of said slots being closed at one end thereof to form a bearing for rotatably supporting said mandrel, of a shaft extending coaxially of said mandrel, a pulley rotatably mounted on said shaft and movable axially thereof into and out of driving engagement with said mandrel, a spring for urging said pulley toward engagement with said mandrel, means comprising a belt extending over said pulley for rotating said pulley, said belt being under sufficient tension to prevent movement of said pulley along said shaft by said spring when said pulley is at rest and ineffective to prevent movement of said pulley by said spring when said pulley is rotated.

5. In a recording machine, the combination with a mandrel for rolling a strip thereon, and a pair of spaced frames, each of said frames having a slot therein closed at one end thereof to form a bearing for rotatably supporting said mandrel, said slots permitting Withdrawal and replacement of said mandrel in said bearings, of a shaft extending coaxially of said mandrel, a rst pulley rotatably mounted on said shaft and movable longitudinally therealong into and out of driving engagement with said mandrel, a second pulley, means for rotating said second pulley, an elastic belt extending over said pulleys and adapted to transmit rotation therebetween, a spring for urging said rst pulley toward driving engagement with said mandrel, said elastic belt being under sufficient tension to prevent movement of said first pulley along said shaft by said spring when said rst pulley is at rest and ineifective to prevent movement of said first pulley by said spring when said nrst pulley is rotated by said belt, and cooperating means on said first pulley and on said mandrel operable to move said first pulley out of -driving engagement with said mandrel upon movement of said mandrel along said slots.

CHRIS A. CHRISTOFF.

References Cited in the le 0f this patent UNITED STATES PATENTS new fr" 

